Control system of lawn mowing vehicle

Abstract

A control system of a lawn mowing vehicle, includes at least one continuously variable transmission drivingly connected to two left and right wheels, a revolution speed detection unit, an acceleration instruction unit, a parking brake instruction sensor, a lawn mower, and a control device. The control device, during the drive of the lawn mower, stops the drive of the lawn mower after the revolution speed of each of the two wheels or the revolution speed of the at least one continuously variable transmission has become zero (0) or within a predetermined range near zero (0), and during stop control of the lawn mower, drives the lawn mower when a target revolution speed, issued by the acceleration instruction unit, of the two wheels or of the at least one continuously variable transmission is not zero (0) and the operation of the parking brake is not instructed.

What is claimed is: 
     
         1 . A control system of a lawn mowing vehicle, comprising:
 at least one continuously variable transmission drivingly connected to two left and right wheels;   a revolution speed detection unit that detects a revolution speed of each of the two wheels, or a revolution speed of a rotation member in a power transmission path from the at least one continuously variable transmission to the wheels;   an acceleration instruction unit that instructs acceleration of the at least one continuously variable transmission;   a parking brake instruction sensor that detects that an operation of a parking brake that, for parking, brakes the continuously variable transmission or brakes a member to which power is transmitted from the continuously variable transmission, is instructed;   a lawn mower; and   a control device that independently controls drive of the at least one continuously variable transmission and drive of the lawn mower,   wherein   the control device, during the drive of the lawn mower, stops the drive of the lawn mower after the revolution speed of each of the two wheels or the rotational speed of the at least one continuously variable transmission has become zero (0) or within a predetermined range near zero (0) and during stop control of the lawn mower, drives the lawn mower when a target revolution speed, issued by the acceleration instruction unit, of the two wheels or of the at least one continuously variable transmission is not zero (0) and the operation of the parking brake is not instructed.   
     
     
         2 . A control system of a lawn mowing vehicle, comprising:
 two left and right continuously variable transmissions drivingly connected to two left and right wheels;   a revolution speed detection unit that detects a revolution speed of each of the two wheels, or a revolution speed of each of the two continuously variable transmissions;   two left and right operation levers as acceleration instruction units;   a neutral sensor detects that the two operation levers are in neutral positions to set a target revolution speed of the two continuously variable transmissions to zero (0), or to stop generation of a driving force of the two continuously variable transmissions;   a parking brake instruction sensor that detects that an operation of a parking brake that, for parking, brakes the continuously variable transmission or brakes a member to which power is transmitted from the continuously variable transmission is instructed;   a lawn mower; and   a control device that independently controls drive of the two continuously variable transmissions and drive of the lawn mower;   wherein   the control device, during the drive of the lawn mower, stops the drive of the lawn mower after the revolution speed of each of the two wheels or the revolution speed of each of the two continuously variable transmission has become zero (0) or within a predetermined range near zero (0), and during stop control of the lawn mower, drives the lawn mower when each of the two operation levers is not in the neutral position and the operation of the parking brake is not instructed.   
     
     
         3 . A control system of a lawn mowing vehicle, comprising:
 a continuously variable transmission drivingly connected to two left and right wheels;   a revolution speed detection unit that detects a revolution speed of each of the two wheels, or a revolution speed of the continuously variable transmission;   an accelerator pedal as an acceleration instruction unit;   a neutral sensor detects that the accelerator pedal is in a neutral position to set a target revolution speed of the continuously variable transmission to zero (0), or to stop generation of a driving force of the continuously variable transmission;   a parking brake instruction sensor that detects that an operation of a parking brake that, for parking, brakes the continuously variable transmission or brakes a member to which power is transmitted from the continuously variable transmission is instructed;   a lawn mower; and   a control device that independently controls drive of the continuously variable transmission and drive of the lawn mower;   wherein   the control device, during the drive of the lawn mower, stops the drive of the lawn mower after the revolution speed of each of the two wheels or the revolution speed of the continuously variable transmission has become zero (0) or within a predetermined range near zero (0), and during stop control of the lawn mower, drives the lawn mower when the accelerator pedal is not in the neutral position and the operation of the parking brake is not instructed.   
     
     
         4 . A control system of a lawn mowing vehicle, comprising:
 at least one continuously variable transmission drivingly connected to two left and right wheels;   a parking brake instruction sensor that detects that an operation of a parking brake that, for parking, brakes the continuously variable transmission or brakes a member to which power is transmitted from the continuously variable transmission is instructed;   a lawn mower; and   a control device that independently controls drive of the at least one continuously variable transmission and drive of the lawn mower,   wherein   the control device, during the drive of the lawn mower, stops the drive of the lawn mower when the operation of the parking brake is instructed, and during stop control of the lawn mower, drives the lawn mower when the operation of the parking brake is not instructed.   
     
     
         5 . The control system of the lawn mowing vehicle according to  claim 1 , wherein
 the control device, during the drive of the lawn mower,   stops the lawn mower after a predetermined time or more has elapsed from a time point when the revolution speed of each of the two wheels, a revolution speed of the continuously variable transmission, or revolution speeds of the two continuously variable transmissions are zero (0) or within the predetermined range near zero (0).   
     
     
         6 . The control system of the lawn mowing vehicle according to  claim 2 , wherein
 the control device, during the drive of the lawn mower,   stops the lawn mower after a predetermined time or more has elapsed from a time point when the revolution speed of each of the two wheels, the revolution speed of the continuously variable transmission, or the revolution speeds of the two continuously variable transmissions are zero (0) or within the predetermined range near zero (0).   
     
     
         7 . The control system of the lawn mowing vehicle according to  claim 3 , wherein
 the control device, during the drive of the lawn mower,   stops the lawn mower after a predetermined time or more has elapsed from a time point when the revolution speed of each of the two wheels, the revolution speed of the continuously variable transmission, or the revolution speeds of the two continuously variable transmissions are zero (0) or within the predetermined range near zero (0).   
     
     
         8 . The control system of the lawn mowing vehicle according to  claim 4 , wherein
 the control device, during the drive of the lawn mower,   stops the lawn mower after a predetermined time or more has elapsed from a time point when a revolution speed of each of the two wheels, a revolution speed of the continuously variable transmission, or revolution speeds of the two continuously variable transmissions are zero (0) or within the predetermined range near zero (0).